I have been having a full feeling in my abdomen along with nausea fatige headaches etc. sometimes i feel a fluttering/spasm in my abdomen or it feels like my spin is being hit from the inside or my ribs are being hit pregnancy tests are neg?

Need to examine: It is not feasible to provide a meaningful opinion without taking additional history, physical examination and may be some tests. It would be prudent to see your doctor and discuss if you may be depressed. Counter-intuitive as it may seem, exercise may help. Start with low intensity exercise such as walking and gradually increase the intensity as tolerated. Wish you good health!